Nervous System Vocab 1

1234567891011121314151617181920212223242526
Across
  1. 1. specialized area of membrane of the axon terminal that faces the plasma membrane of the neuron or muscle fiber with which the axon terminal establishes a synaptic junction.
  2. 3. sensory neurons that carry nerve impulses from sensory stimuli towards the central nervous system and brain
  3. 5. appendage designed to receive communications from other cells
  4. 6. body's chemical messengers. Molecules used by the nervous system to transmit messages between neurons, or from neurons to muscles.
  5. 11. aka: voluntary nervous system. Part of the peripheral nervous system. Consists of neurons that are associated with skeletal or striated muscle fibers and influence voluntary movements.
  6. 12. sensory receptor located in the subcutaneous tissues and is capable of detecting motion and position of the body through a stimulus produced within the body.
  7. 14. also called glial cell or glia, any of several types of cell that function primarily to support neurons.
  8. 16. aka neurilemma cell. Any of the cells in the peripheral nervous system that produce the myelin sheath around neuronal axons.
  9. 18. aka synaptic bouton and terminal bouton. Most distal portion of a neuron's axon and is critical for neural communication.
  10. 22. site of contact between nerve cells. They convert electrical signals into chemical info. which is conveyed between neurons at this site.
  11. 23. aka nerve fibre. Portion of nerve cell (neuron) that carries nerve impulses away from the cell body.
  12. 24. naked areas of the axons located between adjacent myelin internodes.
  13. 26. connection between the central nervous system and rest of the body. Creates the signals that control the functions of the body.
Down
  1. 2. receive signals that trigger an electrical signal by regulating the activity of ion channels.
  2. 4. cord-like structure whose primary role is to provide a pathway to conduct electrical impulses throughout the body. It relays info. from one part of the body to another.
  3. 7. sends and receives signals from your brain
  4. 8. detectable change in the internal or external environment, capable of eliciting a response in to organism.
  5. 9. multipolar neuron that connects afferent and efferent neurons
  6. 10. allows electric impulses to transmit quickly and efficiently along the nerve cells.
  7. 13. mass of nerve cell bodies outside the central nervous system
  8. 15. large granular bodies found in neurons.
  9. 17. main part of the cell around the nucleus excluding long processes such as axons and dendrites.
  10. 19. part of the peripheral nervous system that is responsible for regulating involuntary body functions, such as heartbeat, blood flow, breathing, and digestion.
  11. 20. membrane that receives a signal from the presynaptic cell and responds via depolarization or hyperpolarization.
  12. 21. consists of brain and spinal chord. Called "central" because it combines info. from the entire body and coordinates activity across whole organism.
  13. 25. motor neurons that carry neural impulses away from the central nervous system and towards the muscles to cause movement